package com.atguigu.gmall.realtime.app.func;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.realtime.common.GmallConfig;
import com.atguigu.gmall.realtime.utils.DimUtil;
import org.apache.commons.lang3.StringUtils;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.util.Collection;
import java.util.Set;

/**
 * Author: Felix
 * Date: 2022/4/7
 * Desc: 将维度侧输出流数据写到phoenix表中
 */
public class DimSinkFunction extends RichSinkFunction<JSONObject> {

    private Connection conn;

    @Override
    public void open(Configuration parameters) throws Exception {
        //注册驱动
        Class.forName("org.apache.phoenix.jdbc.PhoenixDriver");
        //建立连接
        conn = DriverManager.getConnection(GmallConfig.PHOENIX_URL);
    }

    @Override
    public void invoke(JSONObject jsonObj, Context context) throws Exception {

        String tableName = jsonObj.getString("sink_table");
        JSONObject dataJsonObj = jsonObj.getJSONObject("data");
        PreparedStatement ps = null;
        try {
            //拼接upsert语句
            String upsertSql = genUpsertSql(tableName, dataJsonObj);

            System.out.println("向phoenix表中插入数据的sql:" + upsertSql);
            //获取数据库操作对象
            ps = conn.prepareStatement(upsertSql);
            //执行SQL语句
            ps.executeUpdate();
            //注意：phoenix的auto_commit默认是false,需要手动提交事务
            conn.commit();
        } catch (Exception e) {
            e.printStackTrace();
            throw  new RuntimeException("向phoenix表中插入数据失败");
        } finally {
            //释放资源
            if (ps != null) {
                ps.close();
            }
        }

        //如果对维度数据进行了修改
        if("update".equals(jsonObj.getString("type"))){
            //将Redis中缓存的维度数据清除掉
            DimUtil.deleteCached(tableName,dataJsonObj.getString("id"));
        }
    }

    //生成upsert语句   dataJsonObj":{"tm_name":"xzls","id":15}
    private String genUpsertSql(String tableName, JSONObject dataJsonObj) {
        Set<String> keys = dataJsonObj.keySet();
        Collection<Object> values = dataJsonObj.values();
        String upsertSql = "upsert into " + GmallConfig.PHOENIX_SCHEMA + "." + tableName
            + " (" + StringUtils.join(keys, ",") + ") values('" + StringUtils.join(values, "','") + "')";
        return upsertSql;
    }
}
